121447680 has 72 divisors (see below), whose sum is σ = 387885792. Its totient is φ = 32385024.

The previous prime is 121447661. The next prime is 121447717. The reversal of 121447680 is 86744121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11974 + ... + 19653.

Almost surely, 2^121447680 is an apocalyptic number.

121447680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121447680 is an abundant number, since it is smaller than the sum of its proper divisors (266438112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121447680 is an equidigital number, since it uses as much as digits as its factorization.

121447680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31651 (or 31637 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 121447680 is about 11020.3303035798. The cubic root of 121447680 is about 495.2179837799.

The spelling of 121447680 in words is "one hundred twenty-one million, four hundred forty-seven thousand, six hundred eighty".